EP0223087A1 - Isolierungsverfahren mittels Imprägnierung von elektrischen Leitern - Google Patents
Isolierungsverfahren mittels Imprägnierung von elektrischen Leitern Download PDFInfo
- Publication number
- EP0223087A1 EP0223087A1 EP86114527A EP86114527A EP0223087A1 EP 0223087 A1 EP0223087 A1 EP 0223087A1 EP 86114527 A EP86114527 A EP 86114527A EP 86114527 A EP86114527 A EP 86114527A EP 0223087 A1 EP0223087 A1 EP 0223087A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tape
- ribbon
- varnish
- groups
- epoxy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004020 conductor Substances 0.000 title claims abstract description 14
- 238000009413 insulation Methods 0.000 title claims description 7
- 238000005470 impregnation Methods 0.000 title description 10
- 239000002966 varnish Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000010445 mica Substances 0.000 claims abstract description 13
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 13
- 239000004593 Epoxy Substances 0.000 claims abstract description 12
- 239000011521 glass Substances 0.000 claims abstract description 12
- 239000004744 fabric Substances 0.000 claims abstract description 11
- WDGCBNTXZHJTHJ-UHFFFAOYSA-N 2h-1,3-oxazol-2-id-4-one Chemical group O=C1CO[C-]=N1 WDGCBNTXZHJTHJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920000642 polymer Polymers 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 8
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims abstract description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 21
- 239000003054 catalyst Substances 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 150000002513 isocyanates Chemical class 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- 239000002985 plastic film Substances 0.000 claims description 7
- 229920006255 plastic film Polymers 0.000 claims description 7
- 239000007859 condensation product Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 125000003700 epoxy group Chemical group 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract 2
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- IZXIZTKNFFYFOF-UHFFFAOYSA-N 2-Oxazolidone Chemical compound O=C1NCCO1 IZXIZTKNFFYFOF-UHFFFAOYSA-N 0.000 description 2
- HTZCNXWZYVXIMZ-UHFFFAOYSA-M benzyl(triethyl)azanium;chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC1=CC=CC=C1 HTZCNXWZYVXIMZ-UHFFFAOYSA-M 0.000 description 2
- KXHPPCXNWTUNSB-UHFFFAOYSA-M benzyl(trimethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC1=CC=CC=C1 KXHPPCXNWTUNSB-UHFFFAOYSA-M 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 125000000623 heterocyclic group Chemical group 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- 229910015900 BF3 Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229920006037 cross link polymer Polymers 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical class C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
- B29C70/865—Incorporated in coherent impregnated reinforcing layers, e.g. by winding completely encapsulated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/02—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising combinations of reinforcements, e.g. non-specified reinforcements, fibrous reinforcing inserts and fillers, e.g. particulate fillers, incorporated in matrix material, forming one or more layers and with or without non-reinforced or non-filled layers
- B29C70/021—Combinations of fibrous reinforcement and non-fibrous material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/30—Drying; Impregnating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0809—Fabrics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
- B29K2105/0854—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns in the form of a non-woven mat
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/10—Mica
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
- B29K2995/0007—Insulating
Definitions
- the present invention relates to a method of insulating by impregnating electrical conductors using isocyanurate and oxazolidone ring resins, in which a ribbon of fabric or glass felt, or plastic film, is wound around the conductors. porous mica paper, the ribbon is impregnated with a varnish comprising a polymerizable liquid resin, then the impregnated ribbon is subjected to a polymerization heat treatment.
- the present invention aims to provide a very flexible and mechanically resistant tape insulation, having no brittleness, and easy to wrap around the conductors using a machine.
- the method according to the invention is characterized in that the ribbon of a bonding powder is initially added between the fabric or glass felt, or plastic film, and the porous mica paper, this bonding powder being formed of a polymer with chains of oxazolidone groups containing epoxy end groups, and in that the liquid polymerizable resin of the varnish contains essentially isocyanates which will transform into isocyanurate groups during the polymerization.
- the bonding powder is added to the tape in a proportion of approximately 20% by weight.
- the bonding powder is added to the ribbon by the wet method, preferably in dissolution in methyl ethyl ketone.
- the tape is free of non-stick interlayer.
- the impregnation varnish is free of solvent.
- the tape bonding powder is obtained by reacting an epoxy resin on an isocyanate in the presence of a condensation catalyst, then mixing the condensation product with an epoxy resin.
- Adding to the mixture of the condensation product and an epoxy resin a reaction catalyst for the epoxy groups on the isocyanate groups.
- the impregnating varnish based on isocyanate derivatives is added with a small amount of epoxy derivatives and a stabilizer.
- the method of the invention makes it possible to form, within the insulating wall of the conductor, a resin with a controlled structure comprising on the one hand linear polymer blocks with oxazolidone sequences, mainly concentrated in the micaceous ribbon, on the other hand crosslinked polymer blocks with isocyanurate sequences, provided by the impregnation varnish, which will serve as nodes for the formation of a three-dimensional macromolecular network.
- the fact of using a bonding powder consisting of an oxazolidone chained resin with epoxy end groups ensures very good bonding between the glass fabric or felt, or the plastic film, and the mica paper, due to the good wettability of mica by such a resin and of its strong adhesive power on glass, which is stored at high temperature, up to above 200 ° C.
- the ribbon formed has very great flexibility, its binder being a polymer linear of thermoplastic nature. This flexibility greatly facilitates its installation on thin conductors.
- the impregnating varnish is one-component, solvent-free. It is very stable at room temperature, where its viscosity is low enough to allow it to easily permeate the wrapped winding.
- This varnish becomes very reactive around 150 ° C in the presence of the active sites of the ribbon polymer network. This promotes gelling of the impregnating resin and leads to low consumption of the impregnating varnish.
- the epoxy functions present in the tape react quickly with the impregnation varnish by forming two types of heterocycles, including mainly isocyanurates which stiffen the resin, even in the absence of catalyst. It is even preferable that the varnish does not contain a catalyst.
- the heterocycles thus formed provide a gain in thermal and mechanical resistance compared to the silicone insulators often used in similar applications.
- the powder is obtained by reacting an epoxy liquid resin sold under the designation Epon 827 by SHELL CHEMICAL Co and toluene diisocyanate in the presence of benzyltrimethylammonium chloride in ethanol.
- Epon 827 an epoxy liquid resin sold under the designation Epon 827 by SHELL CHEMICAL Co
- toluene diisocyanate an epoxy liquid resin sold under the designation Epon 827 by SHELL CHEMICAL Co
- toluene diisocyanate toluene diisocyanate
- benzyltrimethylammonium chloride in ethanol.
- This product is then mixed with unmodified epoxy resins and dissolved in methyl ethyl ketone to facilitate the manufacture of the ribbon, the proportions being - 30 parts of the polymer with chains of oxazolidone rings and epoxy endings.
- EPON 827 - 150 parts of methyl ethyl ketone.
- Oil breakdown tests gave a minimum dielectric strength of 39 kV, for an insulation thickness of less than 1 mm.
- Example 1 The same ribbon is used as that described in part a) of Example 1.
- the impregnation varnish consists solely of the polyisocyanate marketed under the designation OPA 235 by UP JOHN CHEMICAL Co.
- a part of benzyl triethylammonium chloride can be added as a catalyst (without this being necessary).
- a motorette produced under the same conditions as above has a minimum dielectric strength of 36 kV.
- the structure of the tape is similar to that of Example 1, but its bonding resin is different.
- a polymer with oxazolidone units containing epoxy end groups is first formed by reacting the cycloaliphatic epoxy resin sold by the company Ciba-Geigy under the designation CY-192 and toluene diisocyanate in the presence of benzyltrimethylammonium chloride in ethanol.
- This product is mixed with a liquid epoxy resin and dissolved in methyl ethyl ketone for the production of the ribbon in the proportions - 105 parts of the above reaction product - 45 parts of CY-192 epoxy resin - 100 parts of methyl ethyl ketone.
- a catalyst can be added to the ribbon, without this being necessary.
- Example 2 The same varnish is used as in Example 1 and the impregnation, gelation and polymerization of the insulation are likewise carried out.
- the minimum dielectric strength is 35 KV.
- Example 1 The same mica paper and the same glass cloth are used as in Example 1.
- the bonding powder is obtained by mixing the liquid cycloaliphatic epoxy resin sold by the company Ciba-Geigy under the designation CY-179 and the polyisocyanate OPA 235 already mentioned in Example 2, in the presence of lithium chloride in methanol.
- This product is mixed with an epoxy resin and dissolved in methyl ethyl ketone.
- Example 2 The same varnish is then used as in Example 1 and the impregnation, gelation and polymerization of the insulation are likewise carried out.
- the minimum dielectric strength is 38 KV.
Landscapes
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Bodies (AREA)
- Organic Insulating Materials (AREA)
- Manufacture Of Motors, Generators (AREA)
- Patch Boards (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Insulated Conductors (AREA)
- Inorganic Insulating Materials (AREA)
- Communication Cables (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT86114527T ATE53142T1 (de) | 1985-10-22 | 1986-10-21 | Isolierungsverfahren mittels impraegnierung von elektrischen leitern. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8515667 | 1985-10-22 | ||
| FR8515667A FR2588798B1 (fr) | 1985-10-22 | 1985-10-22 | Procede d'isolation par impregnation de conducteurs electriques |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0223087A1 true EP0223087A1 (de) | 1987-05-27 |
| EP0223087B1 EP0223087B1 (de) | 1990-05-23 |
Family
ID=9324091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP86114527A Expired - Lifetime EP0223087B1 (de) | 1985-10-22 | 1986-10-21 | Isolierungsverfahren mittels Imprägnierung von elektrischen Leitern |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4748048A (de) |
| EP (1) | EP0223087B1 (de) |
| AT (1) | ATE53142T1 (de) |
| CA (1) | CA1292412C (de) |
| DE (1) | DE3671564D1 (de) |
| ES (1) | ES2015521B3 (de) |
| FR (1) | FR2588798B1 (de) |
| PT (1) | PT83583B (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000311A (zh) * | 2011-09-14 | 2013-03-27 | 吴江市神州机械有限公司 | 一种漆包机的后龙门架结构 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH672611A5 (de) * | 1987-04-30 | 1989-12-15 | Fischer Ag Georg | |
| US5989702A (en) * | 1994-08-15 | 1999-11-23 | General Electric Canada Inc. | Sandwich insulation for increased corona resistance |
| AU747022B2 (en) * | 1997-06-20 | 2002-05-09 | New York University | Electrospraying solutions of substances for mass fabrication of chips and libraries |
| DE19836293B4 (de) * | 1998-08-11 | 2012-04-05 | Gustav Wilms Ohg | Verwendung einer flachen Schicht aneinander haftender Holzpartikel zur Absorption und zur Abtötung von Bakterien |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2655367B1 (de) * | 1976-12-03 | 1978-04-13 | Siemens Ag | Heisshaertende Reaktionsharzmischung zur Impraegnierung von Isolierungen elektrischer Geraete und zur Herstellung von Formstoffen mit oder ohne Einlagen |
| DE3121725A1 (de) * | 1981-06-01 | 1982-12-23 | Hitachi, Ltd., Tokyo | Elektrisch isolierte wicklungen und ihre herstellung |
| FR2550373A1 (fr) * | 1983-08-03 | 1985-02-08 | Alsthom Atlantique | Procede d'isolation par impregnation de conducteurs electriques |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2847395A (en) * | 1955-06-13 | 1958-08-12 | Minnesota Mining & Mfg | Stable heat-curing epoxy resin compositions |
| CA996849A (en) * | 1972-08-02 | 1976-09-14 | General Electric Company | Insulating material |
| DE3323153A1 (de) * | 1983-06-27 | 1985-01-03 | Siemens AG, 1000 Berlin und 8000 München | Hitzehaertbare reaktionsharzmischungen |
| US4606785A (en) * | 1984-11-15 | 1986-08-19 | Westinghouse Electric Corp. | Simplified method of making high strength resin bonded mica tape |
-
1985
- 1985-10-22 FR FR8515667A patent/FR2588798B1/fr not_active Expired
-
1986
- 1986-10-20 US US06/922,082 patent/US4748048A/en not_active Expired - Fee Related
- 1986-10-20 PT PT83583A patent/PT83583B/pt not_active IP Right Cessation
- 1986-10-21 CA CA000521023A patent/CA1292412C/fr not_active Expired - Fee Related
- 1986-10-21 AT AT86114527T patent/ATE53142T1/de not_active IP Right Cessation
- 1986-10-21 EP EP86114527A patent/EP0223087B1/de not_active Expired - Lifetime
- 1986-10-21 DE DE8686114527T patent/DE3671564D1/de not_active Expired - Fee Related
- 1986-10-21 ES ES86114527T patent/ES2015521B3/es not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2655367B1 (de) * | 1976-12-03 | 1978-04-13 | Siemens Ag | Heisshaertende Reaktionsharzmischung zur Impraegnierung von Isolierungen elektrischer Geraete und zur Herstellung von Formstoffen mit oder ohne Einlagen |
| DE3121725A1 (de) * | 1981-06-01 | 1982-12-23 | Hitachi, Ltd., Tokyo | Elektrisch isolierte wicklungen und ihre herstellung |
| FR2550373A1 (fr) * | 1983-08-03 | 1985-02-08 | Alsthom Atlantique | Procede d'isolation par impregnation de conducteurs electriques |
Non-Patent Citations (1)
| Title |
|---|
| IEEE TRANSACTIONS ON ELECTRICAL INSULATION, vol. EI-13, no. 6, Décembre 1978, pages 436-443, IEEE, New York, US; S.ISOBE et al.: "Large capacity class-H resin molded transformer" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103000311A (zh) * | 2011-09-14 | 2013-03-27 | 吴江市神州机械有限公司 | 一种漆包机的后龙门架结构 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2588798A1 (fr) | 1987-04-24 |
| US4748048A (en) | 1988-05-31 |
| ES2015521B3 (es) | 1990-09-01 |
| PT83583B (pt) | 1994-09-30 |
| FR2588798B1 (fr) | 1987-12-11 |
| ATE53142T1 (de) | 1990-06-15 |
| CA1292412C (fr) | 1991-11-26 |
| EP0223087B1 (de) | 1990-05-23 |
| DE3671564D1 (de) | 1990-06-28 |
| PT83583A (pt) | 1987-05-29 |
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